ILC Workshop on Potential Experiments (ILCX2021)

Chronopixel Silicon CMOS Sensor Development for the ILC

Not scheduled

20m

Room #5 (Zoom Meeting ID: 836 4660 8149)

Oral presentation using Zoom Session C: Tracking detectors C-1: Tracking detectors

Speaker

Nikolai Sinev (University of Oregon (US))

Description

A monolithic silicon CMOS pixel detector with time-stamping capability (Chronopixel)
has been developed based on design goals of the International Linear Collider
(ILC). Each hit is accompanied by a time tag with sufficient precision to
assign it to a particular ILC bunch crossing - thus the name Chronopixel. This
reduces the occupancy to negligible levels, even in the innermost vertex
detector layer, yielding a robust vertex detector which operates at background
levels significantly in excess of those currently foreseen for the ILC.
The Chronopixel can record and store time stamps for two hits in each pixel
while using standard CMOS processing for manufacturing. Following two earlier
prototype fabrication runs and tests, a third prototype design was developed
to resolve earlier issues, including a high capacitance problem. This problem
was traced to the TSMC 90 nm technology design rules, which led to an
unacceptably large value of the sensor diode capacitance. Six different layouts
for the sensor diode were tested in the third prototype, and tests demonstrated
that the high capacitance problem was solved. The third prototype has also been
exposed to HL-LHC radiation levels; results of these tests are also presented.
Simulation of the signal formation from charge particle crossing detector with
one particular sensor design also was done and results will be shown.

Presentation materials

Chronopixel_Sinev.pdf

Chronopixel_Sinev.pptx